OM System
M.Zuiko Digital ED 20mm F1.4 PRO
Micro Four Thirds Mount
40mm-equiv. F1.4 wide prime with 25 cm close focus, 58 mm filter thread, and IPX1 weather sealing.
$799
Launch priceReleased Oct 2020
Sony
FE 50mm F1.2 GM
Sony E Mount
Exquisite resolution and dreamy bokeh combine in a masterful f/1.2 prime.
$1,999
Launch priceReleased Mar 2021
FE 50mm F1.2 GM is 5 months newer.
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Wins
M.Zuiko Digital ED 20mm F1.4 PRO
Wins
FE 50mm F1.2 GM
1 categories tied
Which would you choose?
TL;DR — Key differences
- AM.Zuiko Digital ED 20mm F1.4 PRO has lower Weight (247 g vs 778 g)
- AM.Zuiko Digital ED 20mm F1.4 PRO has lower Length (61.7 mm vs 108 mm)
- AM.Zuiko Digital ED 20mm F1.4 PRO has lower Min focus distance (25 cm vs 40 cm)
- BFE 50mm F1.2 GM has higher Max magnification (0.17 × vs 0.11 ×)
- AM.Zuiko Digital ED 20mm F1.4 PRO has lower Diameter (63.4 mm vs 87 mm)
Key specs at a glance
Size and weight, to scale
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M.Zuiko Digital ED 20mm F1.4 PRO
⌀63 × 62 mm
247 g (0.54 lb / 8.71 oz)
Credit card
85.6 × 54 mm
for scale
FE 50mm F1.2 GM
⌀87 × 108 mm
778 g (1.72 lb / 27.44 oz)
M.Zuiko Digital ED 20mm F1.4 PRO is 46mm shorter and 24mm narrower than FE 50mm F1.2 GM.
M.Zuiko Digital ED 20mm F1.4 PRO is 531 g lighter than FE 50mm F1.2 GM.
Diameter (⌀) is the maximum barrel width; length is measured from the mount to the front of the lens.
Use-case scoring
Which one for what?
Algorithmic scores from verified specs · 10 = best in class
Why pick one over the other
Reasons to choose the M.Zuiko Digital ED 20mm F1.4 PRO
- ✓
Special elements
Adds 1 Aspherical, 1 Super ED, 2 ED
- ✓
Weight
247 g vs 778 g — lower is better
- ✓
Length
61.7 mm vs 108 mm — lower is better
- ✓
Min focus distance
25 cm vs 40 cm — lower is better
- ✓
Diameter
63.4 mm vs 87 mm — lower is better
Reasons to choose the FE 50mm F1.2 GM
- ✓
Special elements
Adds 3 XA (extreme aspherical)
- ✓
Max aperture (Wide)
f/1.2 vs f/1.4 — lower is better
- ✓
Max aperture (Tele)
f/1.2 vs f/1.4 — lower is better
- ✓
Max magnification
0.17 × vs 0.11 × — higher is better
Shared specifications
Internal focus
Both support internal focus
Weather sealing
Both support weather sealing
Control ring
Both support control ring
Custom function button
Both support custom function button
Pros & cons at a glance
Editorially curated highlights and trade-offs.
M.Zuiko Digital ED 20mm F1.4 PRO
Pros
- ✓Bright f/1.4 aperture for low light and subject separation
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Weather-sealed construction for outdoor shooting
- ✓Lightweight design easy to carry all day
Cons
- –Third-party or older alternatives may offer better value
FE 50mm F1.2 GM
Pros
- ✓Outstanding sharpness wide open at f/1.2
- ✓Stunningly smooth, circular bokeh with 11 aperture blades
- ✓Extremely quiet and fast autofocus tracking
- ✓Manageable size and weight for an f/1.2 lens
Cons
- –Expensive investment for a single focal length
- –Heavy compared to standard f/1.8 options
- –Some visible vignetting wide open
Decided which one is right for you?
Compare live prices for the M.Zuiko Digital ED 20mm F1.4 PRO and FE 50mm F1.2 GM at major authorized retailers.
OM System M.Zuiko Digital ED 20mm F1.4 PRO
Sony FE 50mm F1.2 GM
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.